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Calculated Energies of Hydrogen Bonds

PBEPBE/6-31G*

Dimer H Donor H Acceptor comment
HCOOHH2O Formic acid water dimer HCOOH Formic acid H2O Water

Energy components

Dimer Donor Acceptor difference
Energy (hartrees) -265.904860 -189.546579 -76.322481 0.035799 94.0  kJ mol-1
Vibrational zero point energy (cm-1) 12587 7025 4465 -1097 -13.1  kJ mol-1
Total         80.9  kJ mol-1